Help!
My iPhone 4 won't turn back on.
It's on iOS6, but the phone won't turn on, or even connect to the PC and turn on that way.
The top corner button doesn't work, and it hasn't for a long time.

Any help?

Normally, when plugged into a powered USB port (like the one on your computer), the phone should turn on automatically, or it should be detected as in DFU mode by iTunes/Device Manager/redsn0w's Identify feature.

If it's truly not turning on even in DFU mode, and you're sure the USB port is working, I would imagine that your phone is suffering from a hardware problem. It could be anything from a short-circuit on the main logic board, a faulty battery, a faulty flex cable, perhaps a bad dock, water damaged, etc. The easiest solution would be to attempt a warranty swapout from Apple.

Normally, when plugged into a powered USB port (like the one on your computer), the phone should turn on automatically, or it should be detected as in DFU mode by iTunes/Device Manager/redsn0w's Identify feature.

If it's truly not turning on even in DFU mode, and you're sure the USB port is working, I would imagine that your phone is suffering from a hardware problem. It could be anything from a short-circuit on the main logic board, a faulty battery, a faulty flex cable, perhaps a bad dock, water damaged, etc. The easiest solution would be to attempt a warranty swapout from Apple.

Okay, so iTunes is recognizing that there's an iPhone plugged in to your computer, the restore is just failing? What error messages, if any, are you seeing? More detail of what exactly you're seeing will better help us help you.

Okay, so iTunes is recognizing that there's an iPhone plugged in to your computer, the restore is just failing? What error messages, if any, are you seeing? More detail of what exactly you're seeing will better help us help you.

Noo, the restore had started, and then then it crashed and now the iPhone won't turn on or connect to my PC.

Noo, the restore had started, and then then it crashed and now the iPhone won't turn on or connect to my PC.

Hmm. Okay. Would you mind posting your restore logs to a site like pastebin.org and linking them here?

Logs can be retrieved like this:

OS X
At the Finder, hit Command + Shift + G.
Paste in:

Code:

~/Library/Logs/iPhone Updater Logs/

We probably are going to want the most recent, assuming this failure was the most recent restore attempt.

Windows XP/Vista/7
On the Desktop, hit the Windows key + R.
Paste in:

Code:

%AppData%\Apple Computer\iTunes\iPhone Updater Logs

Again, looking for the log file with the time closest to when this botched restore occurred.

However, my intuition is still leaning towards hardware problem. Software restores, especially when it's a restore to a stock firmware, very very rarely "brick" the phone irretrievably without something else internally failing...

Hmm. Okay. Would you mind posting your restore logs to a site like pastebin.org and linking them here?

Logs can be retrieved like this:

OS X
At the Finder, hit Command + Shift + G.
Paste in:

Code:

~/Library/Logs/iPhone Updater Logs/

We probably are going to want the most recent, assuming this failure was the most recent restore attempt.

Windows XP/Vista/7
On the Desktop, hit the Windows key + R.
Paste in:

Code:

%AppData%\Apple Computer\iTunes\iPhone Updater Logs

Again, looking for the log file with the time closest to when this botched restore occurred.

However, my intuition is still leaning towards hardware problem. Software restores, especially when it's a restore to a stock firmware, very very rarely "brick" the phone irretrievably without something else internally failing...

I was using redsn0w to change the firmware back because iTunes wouldn't load the firmware onto it.